621249 has 8 divisors (see below), whose sum is σ = 834240. Its totient is φ = 411216.

The previous prime is 621241. The next prime is 621259. The reversal of 621249 is 942126.

621249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621249 - 2³ = 621241 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (621241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (104280).

2⁶²¹²⁴⁹ is an apocalyptic number.

It is an amenable number.

621249 is a deficient number, since it is larger than the sum of its proper divisors (212991).

621249 is a wasteful number, since it uses less digits than its factorization.

621249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479.

The product of its digits is 864, while the sum is 24.

The square root of 621249 is about 788.1935041600. The cubic root of 621249 is about 85.3274108167.

The spelling of 621249 in words is "six hundred twenty-one thousand, two hundred forty-nine".